Centrifugal clarifier for liquids.



P. P. MASON.-

OENTRIFUGAL GLARIFIER FOE LIQUIDS.

APPLICATION FILED APR. 25, 1914.

Patented J an. 26, 1915.

2 SHEETSSHEET 1.

HU "I 35.

F. P. MASON. .OENTRIFUG-AL OLARIPIER FOR LIQUIDS.

APPLICATION TILED APR.25',1914.

., 1,126,241 Patented Jan. 26, 1915.

2 SHEETS-SHEET 2.

Ill/ll 1 ing is I a specification.

UNITED STATES PATENT onmon.

.FBANKLIN P. MASON, OF NEW YORK, N. Y.

CENTBIFUGAL' CLAZRIFIER FOR LIQUIDS.

To all whom it may concern:

Be it known that I, FRANKLIN P. Mason, a citizen of the United States,and resident of the borough of Brooklyn, in the city-and State of NewYork, have invented a new and useful Improvement in CentrifugalClarifiers for Liquids,

This invention relates to centrifugal clarifiers for liquids, such, forinstance,'as van. nish, with the object in view of providing a device ofthis character which is adapted to promote a step by step clarificationof the liquid in such manner that as the liquid is clarified at eachstep it passes permanently. out of contact with the foreign matterremoved therefrom.

Another object is to provide means for a rapid,-continuous and thoroughclarification without perceptible loss of theliquid being clarified; r

A furtherobject is to provide an arrangement of this character whichmay-.berra-pidly and conveniently taken apart I i still further objectis to provide cer tain improvements inthe form, construction andarrangement of the several parts whereby theabove and other objects maybe effectively carried out.

A practical embodiment of nay-invention is represented in theaccompanying drawings, in which- Fig. lrepresents a vertical centralsection through the device, Fig. 2 represents a section taken in theplane of the line ALA of Fig. I. looking in the direction of the arrows,Fig. 3 represents a detail view of one of the slots and adjacent parts,and Fig. 4 represents a plan view of one of the perforate locking nuts.

, The apparatus includes a housing denoted by 1, which is supportedbysuitable legs 2. The housing is shown in the present case assubstantially cylindrical and of somewhat greater diameter than height.

. Within the housing 1 there is rotatably mounted a bowl 3, which bowlisalso substantially cylindrical in form but has its upper portionslightly less in diameter thanits lower portion.

The bowl 3 is arranged to be rotated at a suitable speed by means of ashaft 4 'mounted in a bearing 5 in the housing 1;

.=l.whiah shaft 4 is splined or otherwise suit ably secured to a collar6, which. collar is Specification of Letters Patent.

of which the giollow i the Inter or of the said bowhand is also proedWith a circular recess 11 adapted to 1 Patented Jan. 26, 1915.

Application filed April 25, 1914. Serial No. 834,396.

. flanged and secured by means of cap screws 7 to-the under side of thebowl 3. The shaft 4 may be rotated by means of a belt 8 engaging apulley 9 secured toithe said shaft, which belt 8 is driven from anyconvenient source of power (notshown). The bowl 3 hasia cover 10 whichis screw threaded to receive the upper edge of the bowl 3. A su1tablepacking gland 12 is provided to insure a liquid tight engagement betweenthe cover and the bowl.

The-cover 10 has a centrally disposed hollow hub, 13, which provides anopening of considerable size through the said cover.

This hub 13' is provided with an inwardly extendingcircular rib 14 whichis interiorly screw threaded for engagement with the exter orscrewthreads on a hollow tube .15, whichftube serves as an inlet to the bowl3. This-tube 15 is of sufiicient length to reach nearlyto the bottom ofthe bowl 3 and flares toward its lower portion, as clearly shown 1nFig.1.

A pair of disks 16, 17 are mounted on the tube 15, near the upper andlower ortions thereof, respectively. The upper disk 16 is held againstdownward movement on the tube 15 by means of a beveled engagementtherewith, as clearly shown at 18; while the periphery of the disk 16has a liquid tight engagement with a shoulder 19 in the. cover 1 10. Thelower disk 17 ,is held against upshoulder 20 thereon audit is lockedagainst downward movement on the tube by means of a nut 21. A nut 22serves to hold the disk 16.against upward movement on the tube 15; andanother nut 23 locks the cover 10 firmly on the tube 15 with the upperand lower edges of the hub 13 abutting the nuts 22 and 23.

1n the disks 16 and 17 there is mounted a seriesof five concentriccylinders 24, said cylinders being spaced substantially at an eoualdistance apart, with the innermost one near the tube 15 and theoutermost one adjacent the peripheries of the disks 16, and 17 Thesecylinders have a tight engagement with the disks 16 and 17 by beingrecessed therein, as clearly shown in Fig. 1; Each of the said cylindersis provided with a plurality of openings through their walls. the saidopenings in the present case taking the ing substantially throughout theheight of the cylinders, but being interrupted intermediate their endsby solid portions 26 for she purpose of strength. Each of the slots isprovided, on the inside of its Cylinder, with a baflle box 27 whichtakes the form of a closed ended trough, having its sides 28 projectinginwardly from the walls of the cylinder toward the next inner cylinder,and having its ends .29 projecting so far as to abut the outer peripheryof the next inner cylinder. 'lhese ballie boxes may be convenientlysecured to the cylinders by means of rivets 30. In the present case,each cylinder is provided with four of the slots and these are arrangedin staggered relation so that the slots in alternating cylinders lie inthe same planes. The disk 17 is fixed against rotation in the bowl'3 bymeans of pins 31,

and paddles 32 are-firmly secured to the under side of the disk17,{which paddles are shown as being two in number,'suostantiallyradially disposed on the disk and spaced slightl y from the bottom ofthe bowl 3, The inner ends of the paddles are curved, as shown at 32*,Figs. 1 and A superstructure is arrangedto rest upon V the top of thehousing 1 which superstructure comprises a feed vessel'33 having anozzle 34 projecting downwardly into the upper end of the tube 15 andspaced from the walls of the said tube.- This superstructure also has ahollow interior which is divided into a pair of outwardly slopingchambers 35, 36; the chamber being the upper one and being adapted toreceive any overflow of the liquid which may back up through the tube15, which overflow may pass through the overflow outlet 37; while thelower chamber 36 is adapted to receive and discharge the clarifiedliquid through its discharge outlet 38, as will be subsequently fullydescribed. Communication is opeirbetween the chamber 36 and the bowl3 bymeans of aperture s39 in the disk 16, whic communicate with ports 40 inthe nut 22,

which ports 40 are an turn open to the hollow ha 13, the ring l4 ofwhich is perforated as at 41 for communication with ports 42 in the nut23, which ports 42 are open to the chamber 36, as clearlv shown.

In operation, the liquid flows into the feed vessel 33 and from there itpasses down through the nozzle 34 into the tube 15. As the liquid isbein-g'fed, the bowl 3, and parts carried thereby, are rotated at a veryhigh speed, e. g., 6000 revolutions per minute, and the liquid, as itpasses out at the lower endof the tube 15, onto the bottom of the bowl3, is rapidly thrown toward the periphery of the said .bowl, by thecentrifugal force'and the action of the paddles 32. As the liquidreaches'thg/periphery of the bowl 3, it is forcedaipwardly by the liquidwhich is following, and it is guided inwardly by liquid to adhere to theinner reason of the convergence of the walls of the bowl 3 as theyapproach the upper end thereof. As the liquid passes inwardly toward thecenter of the bowl, it comes in contact with the outermost cylinder 24,and part of it passes through the slots 25 in said outermostcylinder. Itwill be noted that particles of the impurities contained in theperiphery of the bowl 3, and thus the liquid which passes into the slots25 in the outermost i the centrifugal force will cause the heaviest icylinder is relieved of a certain percentage The liquid thus 0 arifiedwill pass into the next cylinder, and the corresponding cycle ofoperations repeated until the liquid, fully clarified, passes into thespace between the innermost cylinder and the outside of the tube 15. Theliquid is then forced upwardly by virtue of the pressure of the liquidfollowing and also guided in that direction by means of the convergenceof the'walls of the tube 15 toward the upper portion thereof; whichclarified liquid will pass up through the holes 39, ports 40, hub 13,perforations 41 and ports 42, into the chamber 36, and be dischargedinto a convenient receptacle through the discharge out at each stage areleft behind and the clari- 3 fied liquid passes away from them andpermanently out of contact with them, thus obviating entirely'thedrawback of having the liquid interm ngle throughoutthe clarificationwith the impurities which have been removed therefrom. The impurities,when once removed, arepermanently left behind, clingin to variousportions of the bowl and cylinders; leavin the liquid free to be furtherclarified by t e action ;of the succeeding cylinders and their parts,without dan er of being contaminatedby any ofthe oreign matter or.impurities previously removed.

It will be readily seen that in case the liquid is fed too fast into thetube 15, it may overflow around the outside of the nozzle 34 and becaught in receptacles placed .flSllEWent to the overflow outlet 37.Another advantage "of-this device is that theliquid The course of theliquid during the operation is clearly indicated by the ar-.

does not have to, at any stage, pass through filter paper or substancesof that character, and thus the loss of material by reason of adheringto or absorption by the filter paper is obviated; which loss is a veryconsiderable one. When it is desired to cleanse the device, it will beseen that the parts may be verynreadily taken apart, and the cylindersand bowl quickly cleansed, by reason of the fact of the separability ofthe several elements composing the structure, cover-10 has been removed,the tube 15 and the parts carried thereby may be lifted out of the bowl3 and plunged or immersed in a cleansing fluid for a rapidwashingthereof.

I desire it to be understood that various changes may be resortedconstruction and arrangement of the several parts without departing fromthe spirit and scope of my invention; and hence I do not intend to belimited tb. the details shown and described except; as they may be setforth in the claims.

What I. claim is 1. A centrifugal separator comprising a rotary bowhaliquid inlet therefor, means for forcing the liquid from the inlettoward the periphery of the bowl, means for causing the liquid to returnfrom the periphery of the bowl, means for clarifying the liquid duringsaid return comprising a multiple of walls disposed within the bowl andfitted to rotate therewith and having openings therethrough, theopenings in the adjacent walls being laterally staggeri zd with respect.to each other and the openings in alternate walls being substantiallyin line with each other, and an outlet for/the clarified-liquid.

2. A centrifugal separator comprising a rotary bowl, a liquid inlettherefor, means for forcing the liquid from the -inlet toward theperiphery of the bowl, means for causin the liquid to return from theperiphery o the bowl, means for clarifying the liquid during the saidreturn comprising a series ofconcentric cylinders disposed within the.bowl and fitted to rotate therewith and having openings through theirwalls, said openings being arranged in different radial planes inadjacent cylinders and in substantially the same radial plane inalternate cylinders, and an outlet for the clarified liquid within theinnermost cylinder.

3. A centrifugal separator comprising a rotary bowl, a liquid inlettherefor, means for forcing the liquid from the inlet toward theperiphery of the bowl, means for causing the liquid to return from theperiphery oi the bowl, means for clarifying the liquid during the saidreturn comprising a series of concentric cylinders disposed within thebowl and fitted to rotate therewith and having vertically arranged slotsthrough their walls, the said slots being arranged in stag- After the toin the form,v

' through their walls,

Q let for the clarified liquid.

5. A. centrifugal separator comprising a rotary bowl, a liquid inlettherefor, means for forcing the liquid from the inlet toward theperiphery of the bowl, means for causing the liquid to, return from theperiphery of thesbowl, means for clarifying the liquid during saidreturn comprising a series of concentric cylinders disposed within thebowl and fitted to rotate therewith, said cylinders having verticallyarranged. slots through their walls and said slots being provided withmeans. for actuating the liquid, and an outlet for the clarified liquidwithin the innermost cylinder. y

6. A centrifugal separator comprising a rotary bowl, a liquid inlettherefor, means for forcing the liquid from the inlet toward theperiphery of the bowl, means for causing the liquid to return from theperiphery of the bowl, means for clarifying the'liquid during saidreturn comprising a series of concentric cylinders disposed within thebowl and fitted to rotate therewitiu. said cylinders having verticallyarrangedslots the slots being arranged in staggered relation in adjacentcylinders and being provided with means for actuating the liquid, and-anoutlet for the clarified 1i uid within the innermost cylinder.

' A centrifugal separator comprising a rotary bowl, a centrally disposedliquid inlet therefor arranged to feed to the bottom of the bowl,paddles fixed near the bottom of the bowl and arranged to rotatetherewith for forcing the liquid, from the inlet toward the periphery ofthe bowl, means for causing the liquid to return from the periphery ofthe bowl, means for clarifying the liquid during said return comprisinga series of concentric cylinders disposed within the bowl and fitted torotate therewith. said cylinders having openings through their wallsarranged in different radial planes in adjacent cylinders, and an outletfor the ciarifiedliquidwithin the innermost cylinder and surroundingtheinlet.

,8. A centrifugal separator comprising a rotary bowl, a centrally disosed liquid'intione the liquid from-the inlet toward the periphery ofthe bowl, means for causing the liquid to return from the periphery ofthe bowl, and means for clarifying the liquid during is said return,

means having walls parallel to the axis of the bowl, the walls of thebowl being conve'r ed upwardly toward the walls of the sai clarifyingmeans.

9. A centrifugal separator comprising a rotary bowl, a centrallydisposed liquid inlet tube therefor fitted to feed from the top to thebottom of the bowl, means for forcing the liquid from the inlet towardthe periphery o the bowl, means for causin the liquid to return from theperiphery 0% the bowl, and means for clarifying the liquid durin meanshaving walls parallel to the axis of the bowl, the walls of the bowlbeing converged u wardly toward the walls of the said clari ying meansand the walls of the inlet who being converged upwardly away from thewalls of the said clarifying means.

10. A centrifugal separator comprisi .a bowl, a centrally 0 en coverthere or, a liquidiniet tube secure in the opening in said cover anddepending within the bowl, a oi concentric perforate c' lind'erssupportedfrom said tube and fitt to 1'0 tate' with the bowl, andradially disposed said last mentioned its said return, the said lastmeni Witnesses:

cylinders.

11;. A centrifugal separator comprisin a rotary bowl, a centrally opencover there or, 8 Liquid inlet tube secured in the opening in said coverdepending within the bowl, a series of concentric perforatecylinders-supp'orted from said tube and fitted to rotate with the;bowl', radially dis )osed paddles secured to the lower portion 0 saidcylinders, and an outlet around the inlet tube and throu h the cover.

l2, A centri ugal separator comprisin a rotary bowl, acentrally opencover there or, a liquid inlet tube secured in the opening in said coverand depending within the bowl, a series of perforate cylinders supportedfrom said tube and fitted to rotate with the bowl, a pair of diskssecured to the tube and fitted to close the ends of the cylinders,radially disposed paddles secured to the-lower disk, and an outletsurround ing' the 'said tube and passing through the parts which securethe tube to the cover.

In-testimony, that I claim the foregoing as my hivention, I have signedmy name in presence of two witnesses, this twenty third d-ayof April1914.

r FRANKLIN MASON.

F. Gnome G. S. Sonnoann.

m of this intent may be obtained for he cents each, by addressing theccmmluloner of Patents,

. Y Washington; D. 0.

BARRY,

